Update remaining CI references to GitHub

Author: mjpieters

.azure-pipelines/ci.yml

@@ -148,10 +148,10 @@
     'github_button': True,
     'github_type': 'star',
     'github_banner': True,
-    'badges': [{'image': 'https://dev.azure.com/aio-libs/aiosignal/_apis/build/status/CI?branchName=master',
-                'target': 'https://dev.azure.com/aio-libs/aiosignal/_build/latest?definitionId=13&branchName=master',
+    'badges': [{'image': 'https://github.com/aio-libs/aiosignal/workflows/CI/badge.svg',
+                'target': 'https://github.com/aio-libs/aiosignal/actions?query=workflow%3ACI',
                 'height': '20',
-                'alt': 'Azure Pipelines CI status'},
+                'alt': 'GitHub CI status for master branch'},
                {'image': 'https://codecov.io/github/aio-libs/aiosignal/coverage.svg?branch=master',
                'target': 'https://codecov.io/github/aio-libs/aiosignal',
                 'height': '20',

.azure-pipelines/deploy.yml

@@ -55,8 +55,8 @@ def read(f):
     url='https://github.com/aio-libs/aiosignal',
     project_urls={
         'Chat: Gitter': 'https://gitter.im/aio-libs/Lobby',
-        'CI: Azure Pipelines':
-            'https://dev.azure.com/aio-libs/aiosignal/_build',
+        'CI: GitHub Actions':
+            'https://github.com/aio-libs/aiosignal/actions',
         'Coverage: codecov': 'https://codecov.io/github/aio-libs/aiosignal',
         'Docs: RTD': 'https://docs.aiosignal.org',
         'GitHub: issues': 'https://github.com/aio-libs/aiosignal/issues',